Largest lakes & reservoirs in Central Idaho by shoreline length
The length of the exterior shoreline around a lake is measured at the lake’s normal elevation. The shoreline length can be considerably shorter or longer when lake water levels are lower or higher than normal. A lake with many coves has a much longer shoreline than a lake of similar surface area that is nearly circular in shape.When known, the shoreline miles that we report in our statistics include only the lake’s exterior shoreline, and exclude the shorelines of islands located within a lake’s boundaries. In lakes with many islands, those islands’ combined shorelines may exceed a lake’s exterior shoreline.
You can find many of the world’s longest-shoreline lakes on LakeLubbers. Note: For some lakes, "Longest Shorelines" data is unknown or does not apply, so this table may display fewer lakes than the total 2 articles we have published for Central Idaho lakes.
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Below are lakes within USA > US West Region > Idaho > Central Idaho > Compared by longest shoreline length in miles. This list does not represent all lakes in Central Idaho, only the 2 Central Idaho lake articles we have published on the LakeLubbers website.
Lake name ![]() |
Shoreline length in miles ![]() |
Lake description |
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Magic Reservoir (Central Idaho, Idaho, US West Region, USA) |
25 mi | There is magic to be found in central Idaho: Magic Reservoir! This expanse of water was created in 1909 when the Big Wood River was dammed to provide… |
Williams Lake ID (Central Idaho, Idaho, US West Region, USA) |
4 mi | The swish and pop of a fly rod breaks the early morning silence on Williams Lake in the central region of Idaho. A heron wades in the reeds along the… |